Awesome! It does exactly what it is supposed to do.

To make sure that the hands (and or feet) are properly represented by SD, make sure to render them separately from the skeleton with a Depth Map.

Render Settings to get a good Depth Map:

1) Render Settings > Editor > Filtering >

set the Pixel Filter > Mitchell

and the Pixel Filter Radius to 0.1

2) Choose a high resolution (~1000 pixels on a side).